All the magical creatures we spotted in the latest Fantastic Beasts trailer

J.K. Rowling's first-ever screenplay is an adaptation of her book "Fantastic Beasts and Where to Find Them," a fictional textbook assigned to Hogwarts' students in "Harry Potter." The author of the textbook, Newt Scamander (Eddie Redmayne), is a magizoologist whose life work was finding and documenting magical creatures around the world.

So, obviously, the movie version of Newt's adventures is sure to include said magical creatures. But what kinds? The "Harry Potter" films have already brought house elves, giants, and dragons to the big screen. But "Fantastic Beasts" will likely have more portable critters — and the latest trailer revealed at San Diego Comic-Con gave us a look at some more creatures from the film.

First up, we see that there is a house elf seemingly working at the US version of the Ministry of Magic, the Magical Congress of the United States of America (MACUSA). He seems to have a wand in his hand, and we'd guess that he's working as a wand cleaner for government employees, similar to a shoe shiner's stand found in Muggle office buildings.

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Wizards and witches in America also seem to be on better terms with Goblins, perhaps. Here, Newt Scamander and Porpentina Goldstein (Katherine Waterston), the MACUSA witch helping him round up some of his escaped critters, grab a drink at a local speakeasy. A well-dressed Goblin is in the foreground.

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Another well-dressed Goblin is also in the scene:

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Aside from humanoid characters, there's this little monkey. It looks like a Demiguise, an ape-like creature with silvery hair and great big black eyes. It's hair is spun into Invisibility Cloaks, like the one Potter owns.

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We also saw this huge beast, which looks like a cross between a snake and a serpent. If we had to guess, Tech Insider identifies it as an Occamy, a "plumed, two-legged winged creature with a serpentine body." It can reach up to 15 feet long and is very aggressive, especially over its silver eggs.

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Is that what No-Maj — that's the term for "Muggle" in America — Jacob Kowalski (Dan Fogler) could be holding?

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Speaking of Jacob, he gets himself in a fair bit of trouble with whatever this is:

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We think it might be a Nogtail, which resembles "a stunted piglet with long legs, thick stubby tails, and narrow black eyes." It just jumps out right at him:

There's also this little blue bug, which hangs in the air above Porpentina's head. It's probably a Billywig, which is "around half an inch long and a vivid sapphire blue [... with] wings attached to the top of its head." They're typically native to Australia, according to our handy "Fantastic Beasts and Where to Find Them" textbook.

In a previous trailer, Newt seemed to throw a tiny blue ball into the air that turned into the winged creature, almost like a butterfly from a cocoon. In this new trailer, the bird swoops down and shrinks into Newt's hand:

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And then there's this huge monster, which seems to be the source of our protagonists' woes. While it could be a beast that we've seen from the trailer, it's more likely that this is some new creature that we'll find out about over the course of the movie.

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Someone in the trailer describes the destructive beast to auror Graves (Colin Farrell) as: "It was like a, like a ghost. I saw its eyes — shining white eyes — and it dove down underground."

In this shot, you can almost see those great big white eyes and two huge wings if you look closely:

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But what its powers are remain totally unclear.

In a past trailer, fans also got a look at a Niffler. Just look at this little fella!

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Nifflers were first introduced in Rowling's fourth novel, "Harry Potter and the Goblet of Fire." Hagrid teaches about them in his Care of Magical Creatures class, and tells students they are "quite cuddly." But they have one distinctive personality trait: They love shiny and valuable objects. Clearly the Niffler from the trailer is trying to break into a small purse, probably in the hopes of finding coins.

He's probably the little guy trying to break out of Newt Scamander's briefcase to begin with: